Astronergy CHSM6610M/HV Manual - Page 15

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-36 ~ -40

Alternatively, a more accurate correction factor for the

Voc can be calculated using the following formula:

=1-

voc

Where: C

is the correction factor of V

voc

is the open-circuit voltage temperature coefficient of

the selected module (refer to corresponding datasheet).

(°C) is the expected lowest ambient temperature at

min

the system installation site.

The string voltage must not be higher than the

maximum system voltage, as well as the maximum

input voltage of the inverter and other electrical

equipment installed in the system. To ensure the above

requirements, the open-circuit voltage of the string

needs to be calculated using the following formula:

Maximum system voltage≥N*V

Where: N is the number of PV modules in a single

string. V

is the open-circuit voltage of each PV

module (refer to the nameplate or product datasheet).

！ATTENTION

Depending on the maximum fuse ratings of the PV

module, and the local electrical installation standards,

the connection of parallel strings of PV modules needs

to be equipped with suitable fuses or preventive diodes

for circuit protection purposes.

Electrical calculations and design must be performed

by a competent engineer or consultant.

6.2 Electrical connection

1.25

x（25-T

）

Voc

min

Voc

* C

voc

To ensure the normal operation of the system, make

sure the polarity of cables is correct when connecting

modules or loads, such as inverters and batteries. If the

PV module is not connected correctly, the bypass

diode may be damaged. Fig. 14 shows how the PV

modules are connected in series and parallel. PV

modules can be wired in series to boost the voltage.

Series connections are made by connecting the wire

(%/°C)

from the positive terminal of one module to the

negative terminal of the next module. PV modules can

be wired in parallel to increase the current by

connecting the positive terminal of one module to the

positive terminal of the next module. If a module is not

connected correctly, the bypass diode may be

damaged.